Genuinely unresolved points this atlas records rather than silently guesses at: a debated origin for a pedagogical method, a contested causal claim behind a learning theory, an unsettled question of whether a reform actually improved outcomes, or any other fact where the scholarly and policy record itself disagrees. An open question is attached to the entity it concerns and stays visible on that entity's own page, so a reader sees the atlas's own honesty about what education research has not settled rather than a single confident answer standing in for real disagreement.